allen



(NoModex.)

J. 1:". ALLEN.

RIVETINGMAGHINB.

No. 303,968. Y Patented Aug. 26, 1884.

fia veia Z511 UrviTnn STATES BaTnNT Ormes.,

JOHN F. ALLEN, OF BROOKLYN, NEWv YORK.

RlVETlNG-MACHINE.

SPI-ECECATION forming part of Letters Patent No. 303,968, dated August 26, 1884-. Application {ilcd July 2, 188i. (No model.)

suitable cylinder, in which a heavy piston is made to work, acting as an anvil for the action of the hammer in the riveting-machine. The end oi' the rod of said piston, forming the die for the rivet-head, holds the rivet andinachine in place during the operation of the rivcting-hammer, and at the same time presses the plates oi' the boiler-shell together during the operation as the end ot the riveting-machine proper bears against the opposite side of the plates.

ln the accompanying drawings, Figure l, a side view of my improved rivetingqnachine, is represented partly in section. Fig. ll shows the holding-on bar for the machine.

A is a strong frame, inade in the shape of the letter U, or similar to a jaw, having its two arms, A and A, ot' sufficient length to reach the rivets at the circular joints of the plates. Ou the free end of the arm A the riveting-machine It is attached. Thisn riveting-machine or device consists of the cylinder B, in which a suitable piston, C, with pistonrod D attached, is made to' work backward and forward' by any suitable pressure transmitted to said cylinder B by means ol' the action of its valve E. The end of the piston-rod D is provided with a suitable cavity corre spending with the desired shape of the iinished rivct-head, said piston-rod and piston forming the hammer for the riveting `device. The arrangement and construction of this cylinder and valves and of the riveting device R are similar to the arrangements described in Letters Patent Nos. 18S, 224, 193,631, and 194,396, granted to me, but the same may bc arranged with any other suitable valve and gearing. This riveting device R, as has been fully described in the above-mentioned Letters Patent, produces the rivet-head by a succession the eylin der G,

of blows or hammering upon the end of the rivets, similar to hand-work.

To the end of the cylinder B a foot or nozzle, F, is attached with suitable projecting prongs, u, to bear against the surface ot' the boiler-plates.

On the free end ot' the arm A a cylinder, G, is attached, in which a heavy piston, H, can be made to work backward and forward by means of any suitable pressure admitted to the cylinder through the valve J in the usual inanner. The end of the rod H", attached to this piston H, is provided with a suitable cavity to fit over the head n of the rivet to be headed. Vhen the pistoirrod H is moved inward, the necessary space will be had to pass the machine over the plates as well as over'any projecting bolts or rivets. TWhen the het rivet to be headed has been inserted in its hole, the machine is moved so as to comel in line with the rivet, when the piston H is moved so as to move its piston-rod H outward and over the head of the rivet n. By this operation the machine is centered over the rivet and held stationary in that position between the end of this piston-rod H and the end of the nozzle or of the prongs a, against which, by the for- Yard motion ot' the piston H and rod H', the plates are moved, and whereby the plates oi' the boiler-sections are pressed closely together, with the piston-rod il against the rivet-head n, and the riveti 11g-cylinder B against the surface of the plates and the opposite side, the amount of this pressure depending on the diameter of the piston H and the pressure acting against the same. Pressure is then admitted into the cylinder of the riveting device R, when the forward and backward repeated action ol' the 'hammer oi' this riveting device against the hot rivets will form the desired head on the end of the rivet, the piston E in acted upon by the pressure against its surface, acting as an anvil for the action of the hammer in the riveting device.

The machine is suspended from a suitable bolt at M, when the boiler-shell is placed upward, and must then be arranged as to be capable of moving around the shell for operating on the circular joints, and to move upward or downward for the longitudinal joints.

Ward the riveting device R and cylinder C,

1o and from which the machine may be suspended in a horizontal. position.

What I claim as iny invention, and desire to secure by Letters Patent, is-

The I 5 frame,

combination of a portable U-shape A, the elastic anvil consisting of cylin- .to the end of one of its arms,

der G, piston H, and piston-rod H', `attached and the riveting device R, consisting` ofthe cylinder B, piston C, piston-rod D, and foot or nozzleF, having" projecting prongs a attached to the ends of the cylinder B, said riveting device being attached to the end of the other arm of the U-shaped frame, the Whole being constructed and arl ranged to operate in the manner and for thev purpose herein described.

JOHN F. ALLEN.

Vitnesses:

HENRY E. RAEDER, J. GEMMEL, J r. 

